/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HADOOP_PIPES_TEMPLATE_FACTORY_HH
#define HADOOP_PIPES_TEMPLATE_FACTORY_HH

namespace HadoopPipes {

	template <class mapper, class reducer>
	class TemplateFactory2: public Factory {
	public:
		Mapper* createMapper(MapContext& context) const {
			return new mapper(context);
		}
		Reducer* createReducer(ReduceContext& context) const {
			return new reducer(context);
		}
	};

	template <class mapper, class reducer, class partitioner>
	class TemplateFactory3: public TemplateFactory2<mapper,reducer> {
	public:
		Partitioner* createPartitioner(MapContext& context) const {
			return new partitioner(context);
		}
	};

	template <class mapper, class reducer>
	class TemplateFactory3<mapper, reducer, void>
		: public TemplateFactory2<mapper,reducer> {
	};

	template <class mapper, class reducer, class partitioner, class combiner>
	class TemplateFactory4
		: public TemplateFactory3<mapper,reducer,partitioner>{
	public:
		Reducer* createCombiner(MapContext& context) const {
			return new combiner(context);
		}
	};

	template <class mapper, class reducer, class partitioner>
	class TemplateFactory4<mapper,reducer,partitioner,void>
		: public TemplateFactory3<mapper,reducer,partitioner>{
	};

	template <class mapper, class reducer, class partitioner, 
	class combiner, class recordReader>
	class TemplateFactory5
		: public TemplateFactory4<mapper,reducer,partitioner,combiner>{
	public:
		RecordReader* createRecordReader(MapContext& context) const {
			return new recordReader(context);
		}
	};

	template <class mapper, class reducer, class partitioner,class combiner>
	class TemplateFactory5<mapper,reducer,partitioner,combiner,void>
		: public TemplateFactory4<mapper,reducer,partitioner,combiner>{
	};

	template <class mapper, class reducer, class partitioner=void, 
	class combiner=void, class recordReader=void, 
	class recordWriter=void> 
	class TemplateFactory
		: public TemplateFactory5<mapper,reducer,partitioner,combiner,recordReader>{
	public:
		RecordWriter* createRecordWriter(ReduceContext& context) const {
			return new recordWriter(context);
		}
	};

	template <class mapper, class reducer, class partitioner, 
	class combiner, class recordReader>
	class TemplateFactory<mapper, reducer, partitioner, combiner, recordReader, 
		void>
		: public TemplateFactory5<mapper,reducer,partitioner,combiner,recordReader>{
	};

}

#endif
